If I knew then what I know now (6)
Dear 15 year old me,
Make sure you put in those night hours into those IIT worksheets - there is no saying how much the name IIT would take you in life. BITS is cool, SVCE is good - but IIT is a lot better - and you don't know how many times you would be asked if you were from India and the next question would be whether you are from IIT - missing India games is a big deal, alright - but Tendulkar is never going to win the WC - so don't bother about him and stick to ML Khanna and JD Lee.
With tonnes of experience,The 24 year old you.